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July Weather in Portland, United States

Last updated: June 24, 2025

In July, the average temperature in Portland, United States is a pleasant 24°C (75°F). Expect a minimum of 12°C (53°F) and a maximum of 34°C (94°F), providing a nice range for any outdoor activities. With an average humidity of 78%, the air will feel quite comfortable, although it may be slightly sticky. Be prepared for some rain, as 82 mm (3.2 in) of precipitation is expected over 11 days. Enjoy the diverse weather while exploring the beauty of Portland!

July Temperature in Portland

In July in Portland, the average temperature is 24°C (75°F). Maximums can reach 34°C (94°F) and minimums can be as low as 12°C (53°F). This makes Portland an ideal destination for travelers seeking warm weather while still enjoying cooler evenings.

July Weather in Portland: Daily Temperature Highs, Lows, and Averages

The chart illustrates July temperature patterns in Portland, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Portland, July typically has an average temperature of 24°C (75°F), with highs reaching up to 34°C (94°F) and lows dropping to around 12°C (53°F).
JanFebMarAprMayJunJulAugSepOctNovDec262737476070757265533832
Data source: Temperature data for Portland generated using information from the Copernicus Climate Change Service.
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The average of daily temperatures (24 hours) calculated across all days in the month.

July Precipitation in Portland

In Portland in July, the precipitation amount is 82 mm (3.2 in) over the course of 11 days.

July Precipitation Trends in Portland

The chart displays monthly precipitation patterns in Portland, with values for each month alongside July’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how July’s conditions compare to those of other months. In Portland, July typically receives around 82 mm (3.2 inches) of precipitation spread over approximately 11 days.
JanFebMarAprMayJunJulAugSepOctNovDec6771688713610682681081276463
Data source: Precipitation data for July generated using information from the Copernicus Climate Change Service.
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July Humidity in Portland

In Portland in July humidity is 78%. With an average temperature of 24°C (75°F), this humidity feels like a warm blanket wrapping around you, making travel sticky and heavy but also inviting, as long as you're prepared with plenty of water and light clothing.

July Average Humidity in Portland

This chart illustrates the average monthly humidity levels in Portland, with July’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In July, average humidity in Portland is approximately 78%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec87%87%86%87%82%81%78%79%80%82%87%86%
Data source: Humidity data for July generated using information from the Copernicus Climate Change Service.

July UV Index in Portland

In Portland in July, the maximum UV index reaches 10, which corresponds to a very high Exposure Category. With a time to burn of just 15 minutes, it's crucial to take precautions. For more detailed information, you can check the Hourly UV Index in Portland.

Maximum UV Index Levels in Portland for July

The chart shows the monthly maximum UV Index (UVI) for Portland in July, representing the highest UV radiation level. The UVI measures the intensity of ultraviolet radiation from the sun, indicating the potential risk of sunburn and UV-related health issues. In July, the maximum UV index in Portland typically reaches 10, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec24589101097532
Data source: Portland July UVI data generated using information from the Copernicus Climate Change Service.

UV Risk Categories

  •  Extreme (11+): Avoid the sun, stay in shade.
  •  Very High (8-10): Limit sun exposure.
  •  High (6-7): Use SPF 30+ and protective clothing.
  •  Moderate (3-5): Midday shade recommended.
  •  Low (0-2): No protection needed.

How July Weather in Portland Compares to Other Months

Weather in Portland varies notably across the year, with each month offering distinct climate conditions. This page compares July’s weather to other months in Portland, focusing on differences in temperature, rainfall, humidity, and UV levels.

This table compares monthly weather conditions in Portland, showing how July’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-3°C (26°F)67 mm (2.6 inches)87%low
February Weather-3°C (27°F)71 mm (2.8 inches)87%moderate
March Weather3°C (37°F)68 mm (2.7 inches)86%moderate
April Weather8°C (47°F)87 mm (3.4 inches)87%very high
May Weather15°C (60°F)136 mm (5.4 inches)82%very high
June Weather21°C (70°F)106 mm (4.2 inches)81%very high
July Weather24°C (75°F)82 mm (3.2 inches)78%very high
August Weather22°C (72°F)68 mm (2.7 inches)79%very high
September Weather18°C (65°F)108 mm (4.3 inches)79%high
October Weather12°C (53°F)127 mm (5.0 inches)82%moderate
November Weather4°C (39°F)64 mm (2.5 inches)87%moderate
December Weather0°C (32°F)63 mm (2.5 inches)86%low

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